Stay-bolt.



E. 1, bonus;

STAY BOLT.

' APPLICATION FILED SEPT. 21, 1912.

Patented Oct. 28, 1913;

W1 'NESSES longitudinal section of a'bolt .outer UNITED STATES ETHAN I. DODDS, OF CENTRAL VALLEY, NEW YORK, A SSIGNOR, BY MESNE ASSIGN- MENTS, TO FLANNERY BOLT COMYANY, OF PITTSBURGH, PENNSYLVANIA.

. STAY-BOLT.

Original application filed September 25, 1911, Serial No. 651,051; Divided and this application filed September Serial No. 721,667.

To all whom it May concern Be it known that I, 'ETI-IAN I. Donne, a citizen of the United States, residing at Central Valley, in the county of Orange and State of New York, have invented certain new and useful Improvements in Stay- Bolts; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to flexible bolts such as are employed for connecting the outside and inside plates of locomotive and other boilers, and is a division of application Serial Number 651,051 filed September 25th, 1911. y x

The object of the invention is to provide an improved stay bolt capable of a universal angular movement or yield at or near both ends thereof, so that the stay-bolt will be relieved of any vibration due to the expansion of the fire-box and crown sheets, permitting the sheets to expand and contract at wil Another object of the inventionis to provide a stay-bolt that can readily be applied from the inside without the trouble and expense of dismantling the engine, and that can be adjusted at'any time, if necessary.

The accompanying drawing is a view in embodying my invention.

1 represents the inside 'plate of a locomotive boiler, 2 the outside plate, and 29 and 31ybushings secured within holes in said plates. The bushing 31 is cone shape and is setinto the hole in the outer plate 1 and is provided with an integral curved bearing 30 for the rounded head of the bolt, and bushing'29 is screw threaded externally for engagement with the threaded hole in the for the attachment of the l lshing throughwhich the bolt passes, and which is also provided with acurved seat for the rounded head of the bolt, the opening at the opposite end of said bushing being flaring to permit of the free movement of the bolt.

:Hence I would have tors-Patent, is

plate, and is also threaded internally? The bolt 22 comprises a hollow member having a spherical head 23 integral at one end, and a solid member 2% telescoping with the hollow member 22, and formed with a head 25 posite end, the threaded end" of the inner or solid member engaging internal threads formed within the hollow member. One end of the outer member 22 receive the spherical nut 26, which with the head 25 of the inner member forms a ball joint member engagir igA the seat 27in the inner bushing 28.

atone end and threaded at its op-' Patented Oct.28,1913.

is threaded to e head 25, resting against the spherical nut 26 screwed to the outer member of the bolt operates to prevent t-he latter working loose.

It is evident that many slight changes might be resorted to in the relative arrange ment of parts shown and described without departing from the spirit and scope of my invention as set forth in the claims annexed.

it understood that I do not wish to confine myself to thetexact construction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire to secure by Let- 1. A stay bolt comprising an outer section having an integral head, and an inner section provided .at one end with a head-and threaded at its opposite end, the threaded end of the inner section engaging female threads on the outer section.

2.- A stay bolt comprising an outer section carrying two spherical heads one of which is detachable, and an inner section telescoping with the outer section and provided with a head which forms an abutment for the removable head of the outer section.

3. A stay bolt comprising'an outer section carrying two spherical heads one of which is'integral and the other detachable and an inner section telescoping with the outer section and provided with a head which forms an abutment for the removable head of the outer section. 1

4. A staybolt comprising an outer sectioncarrying two heads one of which is detachable, and an inner section telescoping with the outer section and provided with a head resting in contact with said detachable head and shaped to complete the spherical form of the latter.

5. A stay bolt comprising an outer section provided with two hends,and an inner section proyided with a head at one end and serew threaded at the other end the said screw threaded" end engaging internal 10 threads in the outer section.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

" Y ETHAN I. DODDS. \Vitnesses p A. N. BRIGHT, Geo. F. DoWNING. 

